Fix default level for custom streams

Author: Michal Vlasák

CHANGELOG.md

@@ -6,6 +6,7 @@
 - pretty streams created only when needed
 - logger name in pretty loggers
 - empty user-agent logged no more
+- set cosmas's default level for custom streams missing level spec
 
 
 ### Added

src/streams.ts

@@ -54,7 +54,7 @@ const initLoggerStreams = (
 ) => {
     let streams: AckeeLoggerStream[];
     if (options.streams) {
-        streams = options.streams;
+        streams = options.streams.map(stream => Object.assign({ level: defaultLevel }, stream));
     } else if (options.pretty) {
         const pretty = pino.pretty();
         pretty.pipe(process.stdout);